TreeView.OnBeforeSelect(TreeViewCancelEventArgs) Method

Definition

Raises the BeforeSelect event.

C#
protected virtual void OnBeforeSelect(System.Windows.Forms.TreeViewCancelEventArgs e);

Parameters

e
TreeViewCancelEventArgs

A TreeViewCancelEventArgs that contains the event data.

Remarks

Raising an event invokes the event handler through a delegate. For more information, see Handling and Raising Events.

The OnBeforeSelect method also allows derived classes to handle the event without attaching a delegate. This is the preferred technique for handling the event in a derived class.

Notes to Inheritors

When overriding OnBeforeSelect(TreeViewCancelEventArgs) in a derived class, be sure to call the base class's OnBeforeSelect(TreeViewCancelEventArgs) method so that registered delegates receive the event.

Applies to

Product Versions
.NET Framework 1.1, 2.0, 3.0, 3.5, 4.0, 4.5, 4.5.1, 4.5.2, 4.6, 4.6.1, 4.6.2, 4.7, 4.7.1, 4.7.2, 4.8, 4.8.1
Windows Desktop 3.0, 3.1, 5, 6, 7, 8, 9

See also